3.3. VGPs and Pole Migration
The VGP shows the position of the geomagnetic paleopole (Lanza and
Meloni, 2006). The VGP latitudes from this dataset show fluctuations
ranging from -64° to -1° before the transition in the Matuyama section,
which are similar to the data from Haneda et al. (2020) with
fluctuations from -85° to -32° (Fig. 7a and b). These values indicate a
90° change between 7.1 and 12.8 cm depth (5.7 cm
thickness) during the transition due to pole migration (Fig. 7a). A 75°
change in VGP values at 11.8 cm depth (Fig. 7a) shows the precursor of
the reversal according to Valet et al. (2012) (Fig. 7c). In addition, we
plotted the VGP path using VGP latitudes and longitudes based on the
ChRM directions of our data (Fig. 8). VGP locations for the Matuyama
section are in the Southern Hemisphere (Fig. 8). During the transition
from reversed to normal polarity, the magnetic pole fluctuates east of
Africa in the Southern Hemisphere and then migrates to the area west of
North America in the Northern Hemisphere (Fig 8a). The same occurrence
of this migration of the paleopole compares well with the M/B transition
section from Okada et al. (2017) recorded in marine sediments near Japan
(Fig. 8b). After the geomagnetic transition, paleopoles fluctuate around
the geographic north pole (Fig. 8a).